Any other change - typically just parts substitution, stuff/no-stuff or solder jumpers.

Going forward, this is how I'm going to version hardware. I'm going to use the old software standard of n.m.o formatted version numbers, but other folks prefer Axy style, and that's fine too. But I've discovered that there is value to characterizing which changes require a new stencil, and this scheme means I don't have to try and remember that 0.3 could still use the 0.2 stencil.